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AU590693B2 - Batchwise preparation of crosslinked, finely divided polymers - Google Patents

Batchwise preparation of crosslinked, finely divided polymers

Info

Publication number
AU590693B2
AU590693B2 AU70427/87A AU7042787A AU590693B2 AU 590693 B2 AU590693 B2 AU 590693B2 AU 70427/87 A AU70427/87 A AU 70427/87A AU 7042787 A AU7042787 A AU 7042787A AU 590693 B2 AU590693 B2 AU 590693B2
Authority
AU
Australia
Prior art keywords
weight
finely divided
stage
crosslinked
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
AU70427/87A
Other versions
AU7042787A (en
Inventor
Juergen Beck
Heinrich Hartmann
Bernhard Henryk Nowakowsky
Christos Vamvakaris
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF SE
Original Assignee
BASF SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BASF SE filed Critical BASF SE
Publication of AU7042787A publication Critical patent/AU7042787A/en
Application granted granted Critical
Publication of AU590693B2 publication Critical patent/AU590693B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42—Use of materials characterised by their function or physical properties
    • A61L15/60—Liquid-swellable gel-forming materials, e.g. super-absorbents
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00—Processes of polymerisation
    • C08F2/04—Polymerisation in solution
    • C08F2/10—Aqueous solvent

Landscapes

  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Hematology (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Polymerisation Methods In General (AREA)
  • Cephalosporin Compounds (AREA)

Abstract

Crosslinked, finely divided, water-absorbing polymers are prepared in a batchwise process by copolymerization of 100 parts by weight of a monomer mixture of acrylic acid or methacrylic acid, each of which is neutralized with from 0 to 100 mol% of an alkali metal or ammonium base,or acrylamide, methacrylamide or N-vinylpyrrolidone with, as a crosslinking agent, from 0.01 to 5 parts by weight of a monomer containing two or more ethylenically unsaturated double bonds in 20-80% by weight aqueous solution in the presence of an initiator in a multistage procedure in a batchwise mixing apparatus wih constant thorough mixing in all stages, in the first stage the aqueous monomer solution being copolymerized at from 45 DEG to 95 DEG C. and under from 0.1 to 0.8 bar with removal of some of the water by distillation, in the second stage the copolymerization being completed at from 100 DEG to 170 DEG C. under a pressure of up to 8 bar, and in the third stage the water content of the resulting finely divided copolymer being decreased to 0.5-10% by weight under reduced pressure.
AU70427/87A 1986-03-21 1987-03-20 Batchwise preparation of crosslinked, finely divided polymers Ceased AU590693B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863609545 DE3609545A1 (en) 1986-03-21 1986-03-21 METHOD FOR THE DISCONTINUOUS PRODUCTION OF CROSSLINKED, FINE-PARTICLE POLYMERISATS
DE3609545 1986-03-21

Publications (2)

Publication Number Publication Date
AU7042787A AU7042787A (en) 1987-09-24
AU590693B2 true AU590693B2 (en) 1989-11-09

Family

ID=6296932

Family Applications (1)

Application Number Title Priority Date Filing Date
AU70427/87A Ceased AU590693B2 (en) 1986-03-21 1987-03-20 Batchwise preparation of crosslinked, finely divided polymers

Country Status (7)

Country Link
US (1) US4873299A (en)
EP (1) EP0238050B1 (en)
JP (1) JPS62227904A (en)
AT (1) ATE46913T1 (en)
AU (1) AU590693B2 (en)
CA (1) CA1282200C (en)
DE (2) DE3609545A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU622421B2 (en) * 1987-11-17 1992-04-09 Rohm And Haas Company Superabsorbent polymeric compositions and processes for producing them

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CA1282200C (en) 1991-03-26
DE3609545A1 (en) 1987-09-24
EP0238050A3 (en) 1987-11-25
JPS62227904A (en) 1987-10-06
EP0238050A2 (en) 1987-09-23
AU7042787A (en) 1987-09-24
DE3760674D1 (en) 1989-11-09
US4873299A (en) 1989-10-10
EP0238050B1 (en) 1989-10-04

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